Question

a box contains 40 balls of the same shape and weight among the balls 10 balls are white 16 are red and rest are black what is probability that the ball drawn from the box is not black

Answer 1

Step-by-step explanation:

probability = total no of favourable outcomes/total no of balls

let no of black balls be x

10+16+x=40

x=14

p(black)=14/40

p( not black)=1-(14/40)

= 26/40

Answer 2

Answer:

13/20

Step-by-step explanation:

total outcome = 40

white b. = 10

red b. = 16

no: of favourable outcomes = 10+16 = 26

therefore,

 P(E) = 26/40 = 13/20